Switch



April 24,1934. l.. o. PARKER 1,956,361

SWITCH Filed July 24, 1933 79 xNvENToR ATTORNEY Patented Apr. 24, 1934;

iliiiii SWITCH Leslie O. Parker, Anderson, Ind., assigner, by

mesne assignments, to General Motors Corporation, Detroit, Mich., acorporation ci Dei- Application July 24, 1933, Serial No. 681,834

6 Claims.

This invention relates to lock switches of the type including a lockcylinder longitudinally Slidable in a tubular case and actuating alongitudinally slidable switch contact. More particularly this inventionconstitutes an improvement in the switch device described and claimed inthe copending application of L. O. Parker and Charles Woolbert, SerialNo. 487,145, iiled October 8, 1930.

lt is among the objects of the present invention to simplify theconstruction of the movable element of the switch.

Further objects and advantages of the present invention will be apparentfrom the following escription, reference being had to the accompanyingdrawing wherein a preferred embodiment ci one form of the presentinvention is clearly shown.

1n the drawing:

Fig. 1 is an end view of a switch embodying the present invention.

Fig. 2 is a longitudinal sectional view of the switch taken on the line2-2 of Fig. l.

Fig. 3 is a sectional View on the line 3 3 of Fig. 2.

Fig. 4 is a sectional view taken substantially at right angles at thesectional line of Fig. 2.

iiig. 5 is an end view on an enlarged scale of the movable switchcontact supporting member and Contact assembled therewith.

Fig. 6 is a sectional view on the line 6-6 of Fig. 5.

7 is an end view looking in the direction oi arrow 7 of Fig. 6.

In the drawing, designates a tubular switch case to which is welded asleeve 21 adapted to bear against the back of an instrument board 22when the case 20 is secured thereto by passing the threaded end oi thecase 20 shown at d 23 through an opening in the board 22 and applying awasher 25 and a blind nut 24 thereto. The case 29 receives alongitudinal slidable plug 30 or" the conventional type rotativelysupporting a key cylinder 31 which, when the proper key is inserted, maybe turned to retract from an opening 32 in the side of the case 20, thelocking bolt 33. Since the details of the lock do not per se constitutethe present invention, no further description is given except to statethat conventional type of longitudinally movable lock may be used. Thelongitudinal movements of the lock plug 3!) are limited by a pin 35 anda slot 36, the one being provided by the case 20 w and the other by theplug 30.

The case 20 is provided with diametrically opposite ledges 40 which canbe made by bending inwardly some of the material leftafter punching awaythe material of the case 20 so as to provide two diametrically Yoppositeand longil tudinally extending notches 4i which extend 60 from theextreme right hand end of the case 20. Before the plug 30 is insertedwithin the case 2@ a spring 42 is placed within the case 20 against theiedges 40 and then movable contact assembly which includes a carrier 43and a con- 65 tact member 44 secured to the carrier by a rivet 45. itwill be noted that the carrier made of molded non-conducting material isprincipally tubular in construction in order to make it light in weightand to save material. The carrier 70 43 is provided with a flange 46 forreceiving the left hand end of the spring 42. Carrier 43 is providedwith a web 47 which carries the rivet and the yoke portion of thecontact member 44. it will be noted that the contact member 44 75includes branches 48 which are resilient and are adapted to moveslightly relative to the end portion oi the carrier 43, said end portionbeing notched at 49 to receive the branches 48. It is therefore apparentthat the device includes 80 a subassembly comprising case 20, spring 42,carrier 43 and the plug 30.

The other subassembly of the device comprises a stationary contact andparts associated there- Y with. The stationary contacts are arrangeddia- 35E metrically opposite in pairs, one pair of contacts 50 and 51being provided by the heads of rivets and 61 the Shanks of which arethreaded to receive screws 76 and 71. There is also a pair of l,contacts 55 and 56 provided by the heads of go rivets and 56 the latterbeing tapped to receive a terminal screw 76. The contact rivets 60 and65 which are in longitudinal alignment are carried by a projection 52 ofan insulator u 53 having a seini-cylindrical portion 54. The 5i contactrivets 61 and 66 which are in longitudinal alignment are carried by aprojection 57 of an insulator 58 having a semi-cylindrical portion 59.The semi-cylindrical portions 54 and 59 mate together to iorrn anon-conducting cylindrical lining for the interior oi' the switch case20, the projections 52 and 57 extending through the notches 41 providedby the case 20. Before the insulators 53 and 58 are assembled with theoase 20, part 58 is iirst connected with an armored i045 conductorhaving its terminal clip 8l attached to the rivet 66. A conductor 80 ishoused by exible armor members 82 and 83, the latter being attached to aplug 84 adapted to be received within the switch case 20. Beforeassembling these parts with the case, a cap 85 is passed over the plug84. The subassembly of insulators 53 and 58, wire 80, armors 82 and 83,plug 84 and cap 85 are ready to be assembled with the subassemblyincluding the case 20. The insulators 53 and 58 are pushed into the case20, the parts 54 and 59 thereof forming the non-conducting lining of theswitch case and the parts 52 and 57 thereof extending through thenotches 41. Then the plug 84 is permanently attached to the switch caseby deforming portions thereof, indicated at 41a, into an annular groove84a of the plug 84. Then the nishing cap 85 is attached by deformingportions 85a thereof into the depressions formed in the switch case whendeformed into groove 84a of the plug 84.

One use of the present switch is as follows:- Terminal rivet 60 isconnected with a battery or other current source. Terminal rivets 61 and66 are connected with the leads of an ignition coil. Wire is connectedwith an ignition timer. When the switch is locked in the off position asshown, the timer and coil are grounded through terminal rivet 66, itscontact 56, contact 44, contact 55 of terminal rivet 55, a groundingclip 90, cap 85, case 20 and the metal instrument board 20. The switchis moved to on position by the spring 42 which moves the lock plug andcontact carrier 43 toward the left, when the spring 42 is released uponwithdrawal of bolt 33 from the recess 32 by the turning of the properkey 10 in the cylinder 31. In the on position, contact 44 bridgescontacts 50' and 51 thereby connecting the battery with the ignitioncoil connected between terminals 5l and 66, and connecting the coil withthe timer through terminal 66 and wire 80. The ground connection of thecoil and the timer is then broken since contact 55 is then disconnected.

While the form of embodiment of the present invention as hereindisclosed, constitutes a preferred form, it is to be understood thatother forms might be adopted, all coming within the scope of the claimswhich follow:

What is claimed is as follows:

1. In a switch of the class described the combination comprising; meansfor completing a circuit between a pair of spaced contacts including atubular non-conducting member; a spring lead conductor secured withinsaid member, said conductor providing a pair of diverging arms forengagement with their respective contacts.

2. In a switch of the class described the combination comprising; meansfor completing a circuit between a pair of spaced contacts including atubular non-conducting member having a web intermediate its ends; and aspring lead conductor secured to said web, said conductor providing apair of diverging arms for engagement with their respective contacts.

3. In a switch of the class described the combination comprising; meansfor completing a circuit between a pair of spaced contacts including atubular non-conducting member having a web intermediate its ends; andhaving longitudinal notches; and a leaf spring conductor secured to saidweb, said conductor providing a pair of diverging arms, each armextending through one of said notches for engagement with theirrespective contacts.

4. In a switch of the class described the combination comprising; acontact carrier; a tubular contact actuator to receive the carrier, saidactuator having a partition; and means for securing the carrier to saidpartition.

5. In a switch of the class described, the combination comprising; meansfor completing a circuit between spaced contacts, including a tubularnon-conducting member having longitudinal notches; and a conductorsecured within said member, said conductor providing a plurality ofdverging arms, each arm extending through one of said notches forengagement with the respective contacts.

6. In a switch of the class described, the combination comprising; acasing for supporting spaced contacts of the switch; a contact carrier;a tubular non-conducting contact actuator having a web and a pluralityoi longitudinal notches; a rivet for securing the contact carrier on theweb, and said carrier having a pair of integral arms with rounded endsextending through the notches for engagement with the respectivecontacts. I

LESLIE O. PARKER.

